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TY - CONF AU - Pischalnikov, Y.M. AU - Bice, D.J. AU - Grassellino, A. AU - Khabiboulline, T.N. AU - Melnychuk, O.S. AU - Pilipenko, R.V. AU - Posen, S. AU - Pronitchev, O.V. AU - Romanenko, A.S. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Operation of an SRF Cavity Tuner Submerged into Liquid He J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - To precisely control the resonance of 1.3 GHz SRF cavities during testing at the FNAL’s Vertical Test Facility, we install for the first time a double lever tuner and operate it when submerged into the liquid He bath. Both active components of the tuner: electromechanical actuator (stepper motor) and piezo-actuators are operated inside superfluid helium. Accuracy in controlling the SRF cavity resonance frequency will be presented. Specifics of the tuner operation when submerged into liquid He will be discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 660 EP - 663 KW - cavity KW - experiment KW - SRF KW - resonance KW - operation DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-TUP085 UR - http://jacow.org/srf2019/papers/tup085.pdf ER -